Fix up dependency checking (use 'dependencies' instead of 'external_dependencies' -> simpler/easier to remember

src/auto_archiver/modules/html_formatter/__manifest__.py

@@ -2,8 +2,8 @@
     "name": "HTML Formatter",
     "type": ["formatter"],
     "requires_setup": False,
-    "external_dependencies": {
-                          "python": ["loguru", "jinja2"],
+    "dependencies": {
+                          "python": ["hash_enricher", "loguru", "jinja2"],
                           "bin": [""]
     },
     "configs": {

src/auto_archiver/modules/html_formatter/html_formatter.py

@@ -53,6 +53,7 @@ class HtmlFormatter(Formatter):
             outf.write(content)
         final_media = Media(filename=html_path, _mimetype="text/html")
 
+        # get the already instantiated hash_enricher module
         he = get_module('hash_enricher', self.config)
         if len(hd := he.calculate_hash(final_media.filename)):
             final_media.set("hash", f"{he.algorithm}:{hd}")